Yes, there are conversion kits available as full replacement tops with glass. Refer to DuettoMotors.com for details.
I just put a top and frame from a 1999 miata on my wifes 1996. Easy to do and you get a glass back window.
The battery is a Mt-MX5. This is a Interstate battery part#. fits 1990-2008 Mazda Miata. Go to interstatebattiers.com to find a dealer near you.
On a 1991 Miata, the battery is in the trunk. It is probably the same on the 1990.
replace the glass or get window sealant
no
rear side glass or rear windshield?
To repair the broken power window cable on a 1990 Miata MX-5, you'll need to remove the door panel to access the regulator assembly. Inspect the cable for breaks, and if necessary, replace the entire window regulator, as splicing cables can be complex. For a detailed diagram, check the service manual for the Miata or online forums dedicated to Miata enthusiasts, where you can find diagrams and repair guides. Websites like Miata.net or dedicated Facebook groups can also provide valuable resources and support.
The 1990 model of Miata came with a 1.6L DOHC engine and produced around 120 horsepower.
To remove the window winder on a 1990 Mazda Miata, first, you need to locate the retaining clip or screw that holds the winder handle in place. If there’s a clip, use a thin screwdriver to pry it off; if it’s a screw, simply unscrew it. Once the clip or screw is removed, pull the winder handle straight off the shaft. Be sure to take care not to damage the interior panel during the process.
According to Kelley Blue Book, the estimated value of a 1990 Mazda Miata in excellent condition with approximately 150,000 miles on it is $2,400.
trunk right side.......
Call the glass company and tell them.